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What is the function of serotonin?
Where is it secreted? -
Serotonin is believed to play an important part of the biochemistry of depression, migraine, bipolar disorder and anxiety. It is also believed to be influential on sexuality and appetite.
Serotonin is synthesised in serotonergic neurons in the central nervous system and the gastrointestinal tract. -
What is the function of histamine?
Where is it secreted? - Histamine is involved in local immune responses as well as regulating physiological function in the gut and acting as a neurotransmitter.
- Where is dopamine and what is its function?
- Dopamine can be supplied as a drug which acts on the sympathetic central nervous system, producing effects such as increased heart rate and blood pressure. However, since dopamine cannot cross the blood-brain barrier, dopamine given as a drug does not directly affect the central nervous system. To
- Where is epineprhine and what is its function?
- Epinephrine plays a central role in the short-term stress reaction—the physiological response to threatening or exciting conditions (see Fight-or-flight response). It is secreted by the adrenal medulla. When released into the bloodstream, epinephrine binds to multiple receptors and has numerous effects throughout the body. It increases heart rate and stroke volume, dilates the pupils, and constricts arterioles in the skin and gut while dilating arterioles in leg muscle. It elevates the blood sugar level by increasing hydrolysis of glycogen to glucose in the liver, and at the same time begins the breakdown of lipids in fat cells.
- What is norepinephrine and what is its function?
- Along with epinephrine this compound effects the fight-or-flight response, activating the sympathetic nervous system to directly increase heart rate, release energy from fat, and increase muscle readiness.
- What is GABA and what is its function?
- With regard to the human brain, it has been asserted that GABA signals interfere with the registration and consolidation stages of memory formation. This is thought to be possible because the GABA system is found in the hippocampus, an area of brain which has been implicated in memory formation.
- What is glycine and what is its function?
- Glycine is an inhibitory neurotransmitter in the central nervous system, especially in the spinal cord. When glycine receptors are activated, chloride ions enter the neuron via ionotropic receptors, causing an inhibitory post-synaptic potential (IPSP).
- What is cholecystokinin and what is its function
- As a neuropeptide, CCK mediates satiety by acting on the CCK receptors distributed widely throughout the central nervous system. In humans, CCK administration causes nausea and anxiety, and weakly decreases the desire to eat
- What is substance P and waht is its function
- Substance P is involved in the transmission of pain impulses from peripheral receptors to the central nervous system. It has been theorised that it plays a part in fibromyalgia. Capsaicin has been shown to reduce the levels of Substance P probably by reducing the number of C-fibre nerves or causing these nerves to be more tolerant.
- What is enkephalin and what is its function
- Enkephalin or endorphins are endogenous opioid biochemical compounds. They are peptides produced by the pituitary gland and the hypothalamus in vertebrates, and they resemble the opiates in their abilities to produce analgesia and a sense of well-being. In other words, they work as "natural pain killers."
- What is endorphin and what is its function?
- Endorphins are endogenous opioid biochemical compounds. They are peptides produced by the pituitary gland and the hypothalamus in vertebrates, and they resemble the opiates in their abilities to produce analgesia and a sense of well-being. In other words, they work as "natural pain killers."